#include <stdio.h>

/*
int main() 
{
	int a = 10, b = 20;

	printf("a=%d,b=%d\n", a, b);
	int* ptr = &a;
	*ptr = 15;

	ptr = &b;
	*ptr = 19;

	printf("a=%d,b=%d\n", a, b);

	return 0;
}
*/